4 research outputs found
SN1987A and neutrino non-radiative decay
International audienceWe investigate neutrino non-radiative two-body decay in vacuum, in relation to SN1987A. In a full decay framework, we perform a detailed likelihood analysis of the 24 neutrino events from SN1987A observed by Kamiokande-II, IMB, and Baksan. We consider both normal and inverted neutrino mass orderings, and the possibility of strongly hierarchical and quasi-degenerate neutrino mass patterns. The results of the likelihood analysis show that the sensitivity is too low to derive bounds in the case of normal mass ordering. On the contrary, in the case of inverted mass ordering we obtain the bound s/eV () s/eV at 68 (90 ) CL on the lifetime-to-mass ratio of the mass eigenstates and
SN1987A and neutrino non-radiative decay
International audienceWe investigate neutrino non-radiative two-body decay in vacuum, in relation to SN1987A. In a full decay framework, we perform a detailed likelihood analysis of the 24 neutrino events from SN1987A observed by Kamiokande-II, IMB, and Baksan. We consider both normal and inverted neutrino mass orderings, and the possibility of strongly hierarchical and quasi-degenerate neutrino mass patterns. The results of the likelihood analysis show that the sensitivity is too low to derive bounds in the case of normal mass ordering. On the contrary, in the case of inverted mass ordering we obtain the bound s/eV () s/eV at 68 (90 ) CL on the lifetime-to-mass ratio of the mass eigenstates and
SN1987A and neutrino non-radiative decay
We investigate neutrino non-radiative two-body decay in vacuum, in relation
to SN1987A. In a full decay framework, we perform a detailed likelihood
analysis of the 24 neutrino events from SN1987A observed by Kamiokande-II, IMB,
and Baksan. We consider both normal and inverted neutrino mass orderings, and
the possibility of strongly hierarchical and quasi-degenerate neutrino mass
patterns. The results of the likelihood analysis show that the sensitivity is
too low to derive bounds in the case of normal mass ordering. On the contrary,
in the case of inverted mass ordering we obtain the bound s/eV () s/eV at 68 (90 ) CL on the
lifetime-to-mass ratio of the mass eigenstates and .Comment: 9 pages, 6 figure